Method and system for authentication processing, 3gpp aaa server and user equipment

ABSTRACT

The present invention relates to a method and a system for authentication processing, a 3 rd  Generation Partnership Project (3GPP) Authentication, and Authorization Accounting (AAA) server, and a User Equipment (UE). The method includes: receiving an authentication request message that carries authentication mode indication information; determining an authentication mode according to the authentication mode indication information; and performing authentication processing according to the authentication mode. The system for authentication processing includes the 3GPP AAA server and a network device which enables the UE to access the 3GPP AAA server through the network device. Through the method and the system for authentication processing, the 3GPP AAA server and the UE provided herein, the authentication request message sent by the UE carries the authentication mode indication information which has different parameter values so that the 3GPP AAA server can distinguish different authentication modes and perform the authentication processing according to the determined authentication mode.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of International Application No. PCT/CN2009/075880, filed on Dec. 23, 2009, which claims priority to Chinese Patent Application No. 200910001518.6, filed on Jan. 5, 2009 and Chinese Patent Application No. 200910139346.9, filed on May 4, 2009, all of which are hereby incorporated by reference in their entireties.

FIELD OF THE INVENTION

The present invention relates to mobile communications technologies, and in particular, to a method and a system for authentication processing, a 3^(rd) Generation Partnership Project (3GPP) Authentication, Authorization and Accounting (AAA) server, and a User Equipment (UE).

BACKGROUND OF THE INVENTION

In a 3GPP system, a function of an AAA server is: The AAA server receives an authentication request from a UE or a home device and then performs authentication and authorization for the UE or home device. FIG. 1 shows interfaces through which the UE accesses a 3GPP AAA server in the prior art. As shown in FIG. 1, when the UE accesses the 3GPP AAA server through the interfaces of different network devices, the interfaces support different authentication modes.

The Wa interface supports Extensible Authentication Protocol-Subscriber Identity Module (EAP-SIM) authentication or EAP-Authentication and Key Agreement (EAP-AKA) authentication.

The Wm interface supports EAP-SIM authentication based on Internet Key Exchange (IKE) V2 or EAP-AKA authentication based on IKE V2.

The SWm interface supports EAP-AKA authentication based on IKE V2.

The STa interface supports EAP-AKA′ authentication, which may be regarded as a new authentication mode derived from the EAP-AKA authentication with a little modification.

The SWa interface supports EAP-AKA authentication or EAP-AKN authentication.

The S6 b interface supports EAP-AKA authentication based on IKE V2.

The name of the interface between the Security Gateway (SeGW) and the 3GPP AAA server has not been defined, and this interface supports EAP-AKA authentication based on IKE V2.

In a roaming scenario, all the messages sent from the foregoing interfaces need to be forwarded by the Wd/SWd interface which exists between the 3GPP AAA proxy and the 3GPP AAA server. Therefore, the Wd/SWd interface supports all the authentication modes mentioned above.

In the process of implementing the present invention, the inventor finds at least these defects in the prior art: When the 3GPP AAA server supports authentication of all or part of the interfaces shown in FIG. 1 concurrently, some authentication modes are not identifiable to the 3GPP AAA server; the 3GPP AAA server is unable to identify the authentication mode after receiving the authentication request from such interfaces, and the authentication processing cannot go on.

SUMMARY OF THE INVENTION

The embodiments of the present invention provide a method and a system for authentication processing, a 3GPP AAA server and a UE so that the 3GPP AAA server can distinguish every authentication mode.

An aspect of the present invention provides a method for authentication processing. The method includes:

receiving an authentication request message that carries authentication mode indication information;

determining an authentication mode according to the authentication mode indication information; and

performing authentication processing according to the authentication mode.

Another aspect of the present invention provides a 3GPP AAA. server. The 3GPP AAA server includes:

a receiving module, configured to receive an authentication request message that carries authentication mode indication information;

a determining module, configured to determine an authentication mode according to the authentication mode indication information; and

an authentication processing module, configured to perform authentication processing according to the authentication mode.

Another aspect of the present invention provides a UE. The UE includes:

a message constructing module, configured to construct an authentication request message that carries authentication mode indication information; and

a sending module, configured to send the authentication request message constructed by the message constructing module to a 3GPP AAA server through a network device.

Another aspect of the present invention provides a system for authentication processing. The system includes: a 3GPP AAA server described above; and a network device, configured to enable a UE to access the 3GPP AAA server through the network device.

The foregoing technical solution shows that: Through the method and the system for authentication processing, the 3GPP AAA server and the UE provided herein, the authentication request message sent by the UE carries authentication mode indication information which has different parameter values so that the 3GPP AAA server can distinguish different authentication modes and perform the authentication processing according to the determined authentication mode.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of interfaces through which a UE accesses a 3GPP AAA server in the prior art;

FIG. 2 is a schematic diagram of a method for authentication processing according to a first embodiment of the present invention;

FIG. 3 is a schematic diagram of a method for authentication processing according to a second embodiment of the present invention;

FIG. 4 is a schematic diagram of a method for authentication processing according to a third embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a 3GPP AAA server according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a UE according to an embodiment of the present invention; and

FIG. 7 is a schematic structural diagram of a system for authentication processing according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE EMBODIMENTS

The technical solution under embodiments of the present invention is expounded below with reference to accompanying drawings. Evidently, the embodiments described below are exemplary only and not exhaustive. All other embodiments, which can be derived by those skilled in the art from the embodiments given herein without any creative effort, shall fall within the protection scope of the present invention.

FIG. 2 is a schematic diagram of a method for authentication processing according to a first embodiment of the present invention. As shown in FIG. 2, the method includes the following steps:

Step 201: Receive an authentication request message that carries authentication mode indication information.

Step 202: Determine an authentication mode according to the authentication mode indication information.

Step 203: Perform authentication processing according to the authentication mode.

The 3GPP AAA server receives the authentication request messages from the UE through the interfaces shown in FIG. 1. The authentication request message carries the authentication mode indication information. The authentication mode indication information may be a user identifier parameter in a Network Access Identifier (NAI) format, or a user-defined identifier parameter, or an access network identifier parameter, or an access network type parameter. According to different parameter values in the authentication mode indication information, the 3GPP AAA server determines the authentication mode indicated in the received authentication request message. The authentication mode may be: EAP-SIM authentication, EAP-AKA authentication, EAP-AKA′ authentication, EAP-SIM authentication based on IKE V2, EAP-AKA authentication based on IKE V2, or authentication for a Home evolved NodeB (HeNB) or a Home NodeB (HNB) (such as device authentication or host part authentication). After determining the authentication mode, the 3GPP AAA server performs authentication according to the specific authentication mode.

Through the method for authentication processing provided in this embodiment, the authentication request message carries the authentication mode indication information which has different parameter values so that the 3GPP AAA server can distinguish different authentication modes and perform the authentication processing according to the determined authentication mode.

FIG. 3 is a schematic diagram of a method for authentication processing according to a second embodiment of the present invention. As shown in FIG. 3, the method includes the following steps:

Step 301: Receive an authentication request message that carries a user identifier parameter in an NAI format.

The user identifier parameter in the NAI format is authentication mode indication information. This parameter is set in the following ways:

(1) For a Wireless Local Area Network (WLAN) such as the WLAN and Packet Data Gateway (PDG) shown in FIG. 1, the NAI format is:

0<IMSI>@wlan.mnc<MNC>.mcc<MCC>.3gppnetwork.org, which indicates EAP-AKA authentication; or

1<IMSI>@wlan.mric<MNC>.mcc<MCC>.3gppnetwork.org, which indicates EAP-SIM authentication; or

2<IMSI>@wlan.mnc<MNC>.mcc<MCC>.3gppnetwork.org, which indicates EAP-AKA authentication based on IKE V2; or

3<IMSI>@wlan.mnc<MNC>.mcc<MCC>.3gppnetwork.org, which indicates EAP-SIM authentication based on IKE V2.

(2) For an Evolved Packet System (EPS) such as the evolved PDG (ePDG), trusted 3GPP access gateway, non-trusted 3GPP access network, and Packet Data Network Gateway (PDN GW) shown in FIG. 1, the NAI format is:

0<IMS1>@epc.mnc<MNC>.mcc<MCC>.3gppnetwork.org, which indicates EAP-AKA authentication; or

1<IMSI>@epc.mnc<MNC>.mcc<MCC>.3gppnetwork.org, which indicates EAP-AKA′ authentication; or

2<IMSI>@epc.mnc<MNC>.mcc<MCC>.3gppnetwork.org, which indicates EAP-AKA authentication based on IKE V2.

(3) For an H(e)NB, which is accessed through an SeGW in FIG. 1 , the NAI format is:

2<IMSI>@HAP.mnc<MNC>.mcc<MCC>.3gppnetwork.org, which indicates EAP-AKA authentication based on IKE V2 or authentication for the H(e)NB.

It should be noted that the user identifier parameters in the NAI formats are examples of the authentication mode indication information rather than limitations to the authentication mode indication information. The authentication mode indication information may also be indicated by parameters in other formats.

Step 302: Determine an authentication mode according to the user identifier parameter in the NAI format.

Step 303: Perform authentication processing according to the authentication mode.

The following gives more details about the authentication processing corresponding to different authentication modes.

For the EAP-SIM authentication based on IKE V2, the authentication processing includes the following steps:

Step 3031 a: Check whether an unused Authentication Vector (AV) exists in the 3GPP AAA server. If an unused AV exists in the 3GPP AAA server, proceed to step 3032 a; if no unused AV exists in the 3GPP AAA server, proceed to step 3033 a.

Step 3032 a: Perform authentication processing through the unused AV. The procedure ends.

Step 3033 a: Interact with a home serving device to obtain a new AV for performing authentication processing, where the home serving device may be a Home Location Register (HLR) or a Home Subscriber Server (HSS). The procedure ends.

For the EAP-AKA authentication based on IKE V2 or the authentication for the H(e)NB, the authentication processing includes the following steps:

Step 3031 b: Check whether an unused AV exists in the 3GPP AAA server. If an unused AV exists in the 3GPP AAA server, proceed to step 3032 b; if no unused AV exists in the 3GPP AAA server, proceed to step 3035 b.

Step 3032 b: Judge whether a separation bit of an Authentication Management Field (AMF) in the Authentication Token (AUTN) in the unused AV is set. If the separation bit is not set, namely, the value of the separation bit is 0, proceed to step 3033 b; if the separation bit is set, proceed to step 3034 b.

Each AV includes a random number (RAND), an expected response (XZES), a Ciphering Key (CK), an Integrity Key (IK), and an AUTN. At the time of calculating the AUTN, the AMF is used as an input parameter. One or more bits in the AMF are defined as separation bit(s). When the separation bit of the AMF is set, the value of the separation bit is 1; when the separation bit is not set, the value of the separation bit is 0.

Step 3033 b: Perform authentication processing through the unused AV. The procedure ends.

Step 3034 b: Perform exception handling. The procedure ends.

Step 3035 b: When the 3 GPP AAA server interacts with the home serving device, the 3GPP AAA server sends a first indication. The first indication indicates EAP-AKA authentication based on IKE V2 or authentication for the H(e)NB. The home serving device may be an HLR or an HSS.

Step 3036 b: The home serving device generates a new AV according to the first indication and returns the new AV to the 3GPP AAA server. In the AUTN in the new AV, the separation bit of the AMF is not set, namely, the separation bit of the AMF is 0.

Step 3037 b: The 3GPP AAA server obtains the new AV for authentication processing. The procedure ends.

In the EAP-SIM authentication based on IKE V2 or EAP-AKA authentication based on IKE V2 above, because the IKE protocol already provides security services such as encryption/authentication/replay prevention, the 3GPP AAA server does not require the UE to resend its identifier for authentication.

For the EAP-SIM authentication, the authentication processing includes the following steps:

Step 3031 c: Obtain the user identifier from the UE again.

Step 3032 c: Judge whether the obtained user identifier is the same as the user identifier in the authentication request message. If the obtained user identifier is the same as the user identifier in the authentication request message, proceed to step 3033 c; if the obtained user identifier is not the same as the user identifier in the authentication request message, the procedure ends.

Step 3033 c: Check whether an unused AV exists in the 3GPP AAA server. If an unused AV exists in the 3GPP AAA server, proceeds to step 3034 c; if no unused AV exists in the 3GPP AAA server, proceed to step 3035 c.

Step 3034 c: Perform authentication processing through the unused AV. The procedure ends.

Step 3035 c: Interact with the home serving device to obtain a new AV for performing authentication processing, where the home serving device may be an HLR or an HSS. The procedure ends.

For the EAP-AKA authentication, the. authentication processing includes the following steps:

Step 3031 d: Obtain the user identifier from the UE again.

Step 3032 d: Judge whether the obtained user identifier is the same as the user identifier in the authentication request message. If the obtained user identifier is the same as the user identifier in the authentication request message, proceed to step 3033 d; if the obtained user identifier is not the same as the user identifier in the authentication request message, the procedure ends.

Step 3033 d: Check whether an unused AV exists in the 3GPP AAA server. If an unused AV exists in the 3GPP AAA server, proceed to step 3034 d; if no unused AV exists in the 3GPP AAA server, proceed to step 3037 d.

Step 3034 d: Judge whether the separation bit of the AMF in the AUTN in the unused AV is set. If the separation bit is not set, namely, the value of the separation bit of the AMF is 0, proceed to step 3035 d; if the separation bit is set, proceed to step 3036 d.

Step 3035 d: Perform authentication processing through the unused AV. The procedure ends.

Step 3036 d: Perform exception handling. The procedure ends.

Step 3037 d: Interact with the home serving device to obtain a new AV for performing authentication processing, where the home serving device may be an HLR or an HSS. The procedure ends.

For the EAP-AKA′ authentication, the authentication processing includes the following steps:

Step 3031 e: Obtain the user identifier from the UE again.

Step 3032 e: Judge whether the obtained user identifier is the same as the user identifier in the authentication request message. If the obtained user identifier is the same as the user identifier in the authentication request message, proceed to step 3033 e; if the obtained user identifier is not the same as the user identifier in the authentication request message, the procedure ends.

Step 3033 e: Checks whether an unused AV exists in the 3GPP AAA server. If an unused AV exists in the 3GPP AAA server, proceed to step 3034 e; if no unused AV exists in the 3GPP AAA server, proceed to step 3037 e.

Step 3034 e: Judge whether the separation bit of the AMF in the AUTN in the unused AV is set. If the separation bit is set, namely, the value of the separation bit of the AMF is 1, proceed to step 3035 e; if the separation bit is not set, proceed to step 3036 e.

Step 3035 e: Perform authentication processing through the unused AV. The procedure ends.

Step 3036 e: Performs exception handling. The procedure ends.

Step 3037 e: When the 3GPP AAA server interacts with the home serving device, the 3GPP AAA server sends a second indication which indicates EAP-AKA′ authentication. The home serving device may be an HLR or an HSS.

Step 3038 e: The home serving device generates a new AV according to the second indication and returns the new AV to the 3GPP AAA server. In the AUTN in the new AV, the separation bit of the AMF is set, namely, the separation bit of the AMF is 1.

Step 3039 e: The 3GPP AAA server obtains the new AV for authentication processing. The procedure ends.

Through the method for authentication processing provided in this embodiment, the authentication request message carries the authentication mode indication information which has different parameter values so that the 3GPP AAA server can distinguish different authentication modes and perform the authentication processing according to the determined authentication mode.

FIG. 4 is a schematic diagram of a method for authentication processing provided in a third embodiment of the present invention. As shown in FIG. 4, the method includes the following steps:

Step 401: The 3GPP AAA server receives an authentication request message that carries a user-defined identifier parameter.

The user-defined identifier parameter is parameter information newly added to the authentication request message, and is used as authentication mode indication information. For example, the user-defined identifier parameter is located in a certain field of the authentication mode indication information, and the values of the parameter are: 0, which indicates EAP-AKA authentication; 1, which indicates EAP-SIM authentication; 2, which indicates EAP-AKA authentication based on IKE V2; 3, which indicates EAP-SIM authentication based on IKE V2; and 4, which indicates EAP-AKA′ authentication.

Step 402: The 3GPP AAA server determines an authentication mode according to the user-defined identifier parameter.

Step 403: The 3GPP AAA server performs authentication processing according to the authentication mode.

The authentication processing according to the authentication mode in step 403 has been described in the embodiment above, and is not described herein again.

It should be noted that the authentication mode indication information may be indicated by a parameter in other formats. For example, if the authentication request message includes an access network identifier parameter or an access network type parameter, the EAP-AKA′ authentication mode applies.

Besides, the 3GPP AAA server may check whether the authentication mode is the EAP-AKA′ authentication mode according to a user identifier parameter and an access network identifier parameter in an NAI format in the authentication request message; or check whether the authentication mode is the EAP-AKA′ authentication mode according to the user identifier parameter and the access network type parameter in the NAI format in the authentication request message.

Through the method for authentication processing provided in this embodiment, the authentication request message carries the authentication mode indication information which has different parameter values so that the 3GPP AAA server can distinguish different authentication modes and perform the authentication processing according to the determined authentication mode.

FIG. 5 is a schematic structural diagram of a 3GPP AAA server according to an embodiment of the present invention. As shown in FIG. 5, the 3GPP AAA server includes: a receiving module 51, configured to receive. authentication request message that carries authentication mode indication information; a determining module 52, configured to determine an authentication mode according to the authentication mode indication information received by the receiving module 51; and an authentication processing module 53, configured to perform authentication processing according to the authentication mode determined by the determining module 52.

The authentication mode indication information may be a user identifier parameter in an NAI format, or a user-defined identifier parameter, or an access network identifier parameter, or an access network type parameter.

The authentication mode is at least one of the authentication modes: EAP-SIM authentication, EAP-AKA authentication, EAP-AKA′ authentication, EAP-SIM authentication based on IKE V2, EAP-AKA authentication based on IKE V2, and authentication for the H(e)NB.

If the at least one of the authentication modes includes EAP-AKA′ authentication, EAP-AKA authentication based on IKE V2 or authentication for the H(e)NB, the authentication processing module 53 in the 3GPP AAA server may further include: a sending module 531, configured to send an indication to a home serving device when the 3GPP AAA server interacts with the home serving device, where the indication indicates EAP-AKA′ authentication, EAP-AKA authentication based on IKE V2 or authentication for the H(e)NB; and an obtaining module 532, configured to obtain an AV from the home serving device and perform authentication processing, where the AV is generated by the home serving device according to the indication.

The authentication processing in this embodiment is performed by the 3GPP AAA server according to the determined authentication mode in the same way as the authentication processing described in the embodiment above.

Through the 3GPP AAA server provided in this embodiment, the authentication request message carries the authentication mode indication information which has different parameter values so that the 3GPP AAA server can distinguish different authentication modes and perform the authentication processing according to the determined authentication mode.

FIG. 6 is a schematic structural diagram of a UE in an embodiment of the present invention. The UE includes: a message constructing module 61, configured to construct an authentication request message that carries authentication mode indication information; and a sending module 62, configured to send the authentication request message constructed by the message constructing module 61 to a 3GPP AAA server through a network device. The authentication mode indication information may be a user identifier parameter in an NAI format, or a user-defined identifier parameter, or an access network identifier parameter, or an access network type parameter.

The UE provided in this embodiment constructs the authentication request message, and sends the authentication request message to the 3GPP AAA server. The 3GPP AAA server determines the authentication mode and performs authentication processing according to the determined authentication mode. The detailed process has been described in the above embodiment of the method for authentication processing.

Through the UE provided in this embodiment, the authentication request message is constructed and sent to the 3GPP AAA server. The authentication request message carries authentication mode indication information so that the 3GPP AAA server can distinguish different authentication modes and perform the authentication processing according to the determined authentication mode.

FIG. 7 is a schematic structural diagram of a system for authentication processing according to an embodiment of the present invention. As shown in FIG. 7, the system includes a 3GPP AAA server 7 illustrated in FIG. 5 and a network device 8 which is configured to enable a UE illustrated in FIG. 6 to access the 3GPP AAA server 7 through the network device 8. The network device 8 that accesses the 3GPP AAA server 7 and its interface may be included in the examples given in FIG. 1, and the network device 8 may be a PDG, an ePDG a trusted 3GPP access gateway, a non-trusted 3GPP access network, or an SeGW.

Through the system for authentication processing provided in this embodiment, the received authentication request message carries authentication mode indication information which has different parameter values so that the system for authentication processing can distinguish different authentication modes and perform the authentication processing according to the specific authentication mode.

Persons of ordinary skill in the art should understand that all or part of the steps of the method under the present invention may be implemented by a program instructing relevant hardware. The program may be stored in a computer readable storage medium. When the program runs, the steps of the method specified in any of the embodiments above can be performed. The storage medium may be a magnetic disk, a Compact Disk-Read Only Memory (CD-ROM), a Read Only Memory (ROM), or a Random Access Memory (RAM). Finally, it should be noted that the above embodiments are merely provided for describing the technical solution of the present invention, but not intended to limit the present invention. It is apparent that persons skilled in the art can make various modifications and variations to the invention without departing from the scope of the invention. The present invention is intended to cover the modifications and variations provided that they fall within the scope of protection defined by the appended claims or their equivalents. 

1. A method for authentication processing, comprising: receiving an authentication request message that carries authentication mode indication information; determining an authentication mode according to the authentication mode indication information; and performing authentication processing according to the authentication mode.
 2. The method according to claim 1, wherein: the authentication mode indication information is a user identifier parameter in a Network Access Identifier (NAI) format, or a user-defined identifier parameter, or an access network identifier parameter, or an access network type parameter; the determining the authentication mode according to the authentication mode indication information comprises: determining the authentication mode according to the user identifier parameter in the NAI format; or determining the authentication mode according to the user-defined identifier parameter; or determining the authentication mode according to the access network identifier parameter; or determining the authentication mode according to the access network type parameter.
 3. The method according to claim 1, wherein the authentication mode comprises at least one of the following authentication modes: Extensible Authentication Protocol-Subscriber Identity Module (EAP-SIM) authentication, EAP-Authentication and Key Agreement (EAP-AKA) authentication, EAP-AKA′ authentication, EAP-SIM authentication based on Internet Key Exchange (IKE) V2, EAP-AKA authentication based on IKE V2, or authentication for a Home evolved NodeB (HeNB) or a Home NodeB (HNB).
 4. The method according to claim 3, wherein for the EAP-AKA authentication based on IKE V2 or the authentication for the H(e)NB, the performing authentication processing comprises: sending a first indication that indicates the EAP-AKA authentication based on IKE V2 or the authentication for the H(e)NB when interacting with a home serving device; and obtaining an Authentication Vector (AV) generated by the home serving device according to the first indication, and performing the authentication processing.
 5. The method according to claim 3, wherein for the EAP-AKA′ authentication, the performing authentication processing comprises: sending a second indication that indicates the EAP-AKA′ authentication when interacting with the home serving device; and obtaining an Authentication Vector (AV) generated by the home serving device according to the second indication, and performing the authentication processing.
 6. A 3 ^(rd) Generation Partnership Project (3GPP) Authentication, Authorization and Accounting (AAA) server, comprising: a receiving module, configured to receive an authentication request message that carries authentication mode indication information; a determining module, configured to determine an authentication mode according to the authentication mode indication information received by the receiving module; and an authentication processing module, configured to perform authentication processing according to the authentication mode determined by the determining module.
 7. The 3GPP AAA server according to claim 6, wherein: the authentication mode indication information is a user identifier parameter in a Network Access Identifier (NAI) format, or a user-defined identifier parameter, or an access network identifier parameter, or an access network type parameter.
 8. The 3GPP AAA server according to claim 6, wherein the authentication mode comprises at least one of the following authentication modes: Extensible Authentication Protocol-Subscriber Identity Module (EAP-SIM) authentication, EAP-Authentication and Key Agreement (EAP-AKA) authentication, EAP-AKA′ authentication, EAP-SIM authentication based on Internet Key Exchange (IKE) V2, EAP-AKA authentication based on IKE V2, or authentication for a Home evolved NodeB (HeNB) or a Home NodeB (HNB).
 9. The 3GPP AAA server according to claim 8, wherein the authentication processing module comprises: a sending module, configured to send an indication to a home serving device when the 3GPP AAA server interacts with the home serving device, wherein the indication indicates the EAP-AKA authentication based on IKE V2, or the authentication for the H(e)NB, or the EAP-AKA′ authentication; and an obtaining module, configured to obtain an Authentication Vector (AV) from the home serving device and perform the authentication processing, wherein the AV is generated by the home serving device according to the indication.
 10. A User Equipment (UE), comprising: a message constructing module, configured to construct an authentication request message that carries authentication mode indication information; and a sending module, configured to send the authentication request message constructed by the message constructing module to a 3^(rd) Generation Partnership Project (3GPP) Authentication, Authorization and Accounting (AAA) server through a network device.
 11. The UE according to claim 10, wherein: the authentication mode indication information is a user identifier parameter in a Network Access Identifier (NAI) format, or a user-defined identifier parameter, or an access network identifier parameter, or an access network type parameter. 